I haven't been diagnosed with it, but I do have occasional symptoms. Yesterday was one of my symptom days. I stood up to change clothes, and my heart rate shot up to around 125 bpm and my bp was 110/62. But it doesn't happen very often for me.
If it doesn't happen very often then you might have very mild pots or you might not have it wich is a good thing! When I stand up mine goes to about 155 and I have a resting heart rate of 112-150 so I'm very tachycardic.